How to use probs with preact

May depend on your bindings but I do have an example at color-scheme-tool/src/App.res at 08c39c18aae4616e411a58375054ca05b4e714d5 · jaidetree/color-scheme-tool · GitHub

The key is:

onInput={e => {
  e
  ->JsxEvent.Form.currentTarget
  ->DomUtils.Event.getValue
  ->Option.getOr("0e0e0e")
  ->Hex
  ->setSelectedColor
}}

JsxEvent.Form.currentTarget is built into the JSX module. DomUtils.Event.getValue is a custom binding for reading the .value from an element (though could be better named).